I guess at least the second belongs to foraminiferans. I assure you that no mollusc larvae (before the juvenile stage) has such a spiral coiling.

With the exception of picture no. 4 (I am not quite sure), they are all foraminiferids.

You ought to check in : DOI: 10.4267/2042/33629 (or at: http://paleopolis.rediris.es/cg/CG2010_BOOK_02/fr-index.html)

or in Murray J.W. (1991).- Ecology and palaeoecology of benthic foraminifera.- Longman Scientific & Technical, 397 p.

Best

Thank you

Dear Hanane,

I think they are all forams:

1. Buliminidae

2. Rotalidae

3+4+6. Planktic forms 

5. Buliminidae

Best wishes:

Andrea

Thank you Andrea

from last picture i could say it is foraminefra and these species are planktonic found more in estuarine area.

thanks